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According to court filings first posted by TMZ.com, Harper began the proceedings October 8 and cited "irreconcilable differences" as the reason for the divorce. Harper is also filing for custody of the couple's two children, Ellery, 9, and Jaya, 5.

The court papers also stated that the couple spilt in January.

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Dern, best known for her role as Dr. Ellie Sattler in the blockbuster "Jurassic Park," was reportedly "blindsided" by the news of the filing.